The newest emissary from Earth arrived at the Red Planet on March 10. The NASA craft, known as the Mars Reconnaissance Orbiter, joins three other satellites exploring the planet: two from NASA and one from the European Space Agency. Meanwhile, the twin rovers Spirit and Opportunity, more than 2 years after they landed, continue their treks along the Red Planet's surface.
Note: To comment, Science News subscribing members must now establish a separate login relationship with Disqus. Click the Disqus icon below, enter your e-mail and click “forgot password” to reset your password. You may also log into Disqus using Facebook, Twitter or Google.